Description

In the Linux kernel, the following vulnerability has been resolved: drm/xe: Fix bo leak in xe_dma_buf_init_obj() on allocation failure When drm_gpuvm_resv_object_alloc() fails, the pre-allocated storage bo is not freed. Add xe_bo_free(storage) before returning the error. xe_dma_buf_init_obj() calls xe_bo_init_locked(), which frees the bo on error. Therefore, xe_dma_buf_init_obj() must also free the bo on its own error paths. Otherwise, since xe_gem_prime_import() cannot distinguish whether the failure originated from xe_dma_buf_init_obj() or from xe_bo_init_locked(), it cannot safely decide whether the bo should be freed. Add comments documenting the ownership semantics: on success, ownership of storage is transferred to the returned drm_gem_object; on failure, storage is freed before returning. v2: Add comments to explain the free logic. (cherry picked from commit 78a6c5f899f22338bbf48b44fb8950409c5a69b9)

Weaknesses 1

Affected Products 3

References 3

• git.kernel.org https://git.kernel.org/stable/c/8fa8c2a22585fcb31dc605b91a67bbcca223fdd7
  Patch
• git.kernel.org https://git.kernel.org/stable/c/93a528f67ce5095bcab46a69839eca97f43dd352
  Patch
• git.kernel.org https://git.kernel.org/stable/c/f9ad21b90162baf1d78f8036ff3813c3ec1ac88e
  Patch

Remediation

• git.kernel.org https://git.kernel.org/stable/c/8fa8c2a22585fcb31dc605b91a67bbcca223fdd7
  Patch
• git.kernel.org https://git.kernel.org/stable/c/93a528f67ce5095bcab46a69839eca97f43dd352
  Patch
• git.kernel.org https://git.kernel.org/stable/c/f9ad21b90162baf1d78f8036ff3813c3ec1ac88e
  Patch